Adjustable boring machine



Patented Mar. 8, 1927.

P.1ire/r11? Y oFFic-E.

NOTLEY MADDOXf-OF LOS ANGELES, -CAJQFORNIA` ADJUSTABLE BORING. MACHINE.

Application inea August 6, 1925'. serial No. 48,581.

My invention relates to improvements in boring machines.v Certain of the fea-tures lcontained therein make it also Classifiable with drilling machines.

These features are prominent over the art, the principalv onesbeing pointed out while others will be quite obvious to those skilled in the art to which this invention appertains.

The principal features inculcatcd therein are,` namely:

First: A boring bar adapted to have mounted thereupon dierent kinds and sizes of drills, angers, bits i and 'various other kinds of similar tools used for `drilling into rocky'earth and wood.

Second: The device is automatic, adjustable and portable. p

Third: It is operative in a pla-ne throughout'an angle of 120,ofva circle. j

Fourth: It is ,engine driven and hand operated.

Fifth: It is simple tofconstruct and is efficient -in accomplishing the workA for which' it is intended.

In addition to these features as .outlined many others are apparent, a novel one being its use for drilling holes in stumps` these holes being drilled at an 4angle so vas to vconverge in forming a pocket having a central hole opening therefrom out of the top of the stump, then filling the holes with distillate or the. like vand allowed to stand. Later, by they application .of a blow torch, means of` whichhave been provided yfor supplyingthe air in connection with the boring device, suggestsv a simple, Qcheap and less laborious method for removing stumpsby burning` them, since. this deviceiszpriinarilyfdesigned to be used inconnection with an adjustable truck, to. which is appli.- cable an adjustable sawing machine1 for which Letters Patent'have been allowed and are pending, as well asthe adjustable boring machine. andthe objects for whichit isV intended will readily port-ray the reason for wishing to combine it as a" Vuseful yauxiliary with the adjustable sawing machine with which it is associated.

ing description for a clear and Vconcise revelation of the same: i

Figure 1 is a perspective view of the boring V machine mounted upon an adjustable and portable truck, connected to a source of f power and an air compressor;

yof Figure 1.

Referring to the drawing and the follow- Figure 2 is a view taken on the line 2 2 of Figure 1. j Figure 3 is a view takenon the line y3 3 In Figure 1, is an engine of any prefered type or make, mounted upon a wood platform (32) having a common engine shaft upon the eXtreme ends of which are mounted drivel sprockets (27) and flhe ydrive sprocket (2) is connected to a driven sprocket (4) mounted upon a pinion shaft (54) by a sprocket chain Upon the pinion shaft (54) is a pinion gear (53) keyed thereto and which functions with a bevelgear (52) in rotating boring bar and a bevel gear (51) in reversing the'rotation of boring tool (56) fastened to boring bar (45) by a pin (57) the boring bar (45) extending throug sleeve (55) having a square slot (50) upon which the bevel gears (51) and (52) are keyed.

The sleeve (55) contains a gro-ove (47) into which is extended an operating handle 48 hingedly fastened at (49)'. The sleeve (55) having a friction fit upon the boring bar ('45) extending through the square slot (50) readily holds the bevel gears (51) and (52) in mesh with pinion gear upon the shifting of sleeve (55) by operating handle (48)7 throwing either combination in gear.

The sleeve (55) and pinion shaft (54) are rotatively mount-ed .within a split hous- `lng (15) and angularly adjustable in a plane `throughout an angle of 120 degrees of a circle, said housing containing a slotted portion for the reception of the pinion gear (53) and bevel gears (51) and (52). The housing'(15) is made in two halves and bolted together by bolts inserted in holes (16), the ends (6) of said halves are made semi-circumferential, so that when the two halves are bolted together they form a. shaft, which is carried and isrotatable in the side top plate member (9) of the supporting framework fastened to the main truck frame.

Fastened to the housing (15) and extending therefrom parallel with the boring bar V(45) are two racks (17) machined into an endibear'ing (46) containing a Aholey through which the boring bar (45) is extended.

Upon the racks (17) is mounted a movable carriage (39) by means of which the boring tool is yfed into and outxof the work,

Comprising the carriage (39) whichA is also a-'4 split member and bolted together at bolt holes (40) are pinion gears 18t and 2Ot mounted upon pinion shafts (19)' and (21) and meshing with racks (17).

A set collar (43) havinga setscrew (44')- i (39) within the racks ('17), being governable by a hand wheel hafving a handle (38) and keyed to pinion shaft (21)".

By rotating" the hand wheel in a counter-clockwise direction, the boring tool will be fedV into the work and upon the rotation of the handwheel in. a7 clockwise direction the boringl tool will be displaced from the work. y

rlhe racks (17) are madeof a' dependable length so that any ordinary depth hole may be made; however, if a greater depth hole is desired a coupling may be added upon the boring end of the boring bar (45).

The carriage and racks mounted upon the `housing (15) and angularly adjustable, are

held in the various angles desired by ratchet (14) and a pawl (12), the ratchet being interposed between the housingl (15) and top side frame member lof supporting frame, while the pawl (12), hinged on a pin (11)', is hek; engageably thereto by a tension spring (is y The adjustable portion of the boring machine is carried upon an adjustable truck by means of a framework consisting of `two angle iron upright frame members bent so as to have their horizontal' legs engageable to the angle iron side frame members (42) of the main truck frame by bolts (31) and wing nuts (30).

Transversely connecting the upright members (5) are top side framey members bolted at 9b and bottom side frame members riveted at 10C.

Additional holes (8) are provided in the upright members (5) for adjustability of revolvable boring machine supported by said framework. y

Gusset plates V(7) riveted to angle iron uprights (5) at 7d insure a more rigid construction of the framework when applied to the adjustable truck. l

This truck consists of angle iron side frame members (.42) as stated beforeY and has movably mounted thereon a wooden plat-form (32) having` a top platform plate member (29) and a bottom platform plate member K rlhe ends of the platform plate members (29) and (35) are bolted together at (37) and rollers ('33)` andi (34) -impinge upon the sides and bottom of angle iron frame (42).

This structure of adjustable truck is fully described andclaimed in Patent #1,547 ,7 70.

Auxiliary connected to t-he engine (1) and compounded to boring machine is an air compressor (23) mounted upon a base (24), theaircompressor ('23) having a nozzle (22) to which is applicable an air hose which may be connectedto a blow' torch for providing a! more violent flame in the removal of stumps by burning', this being one of the principal objects, as stated before, for which thisA invention' is' intended;y

The shaft (25) of the' air' compressor is connectedl to a sprocket (27) fastened on the engine shaft (28') by a sprocket chain27a.

It will be obvious that certain modifications may be necessary upon thel adaptation ofthe invention to the several pi'lrposes for which it is' intendedan'd the' modifications will be allowable so lo'ngas no marked depzIi-rturev is ma'de from thev features as set forth' in the followingclairns appended hereunto.

Having thus fully described my invention. I claim: j

1. An adjustable borin'gma'chine comprising a framework consisting' of two parallel aforesaid housing and end'bearing; a boring.

bar and tool` theb-ar of'said boring bar and tool of extendable length being-'intermediately positioned in a plane between and in parallel relation to aforementioned parallel racks and adapted to be raised and lowered through engagement to aforesaid carriage, substantially as herein set forth. j i

2. In an adjustable boring machine of the character described. a: rotatable boring' bar and tool, two parallel` racks carried by a rotatable housing andl having their` projecting ends terminating-in an end". bearing' and supporting in' alignment therewith said boring` bar andntool: a carriage supported andjlongitudinally adjustable in a plane with said parallel racks,`the saidboring bar extending through said carriage and end bearing being adapted to' be fed into the work by a hand wheel operatively connected to 4aforesaid racks by pinions meshing with said racks and supported in said carriage upon pinion shafts carrying companion gears, whereby the engagement of said companion gears to aforementioned' handl wheel the aforesai-dboring bar 4and" tool isfed into and out of the work, substantially as setv forth. 

